/Engine/Source/Runtime/Core/Public/Async/TaskGraphInterfaces.h
When a set of tasks complete, fire a scoped event
void TriggerEventWhenTasksComplete ( [FEvent](API\Runtime\Core\HAL\FEvent) * InEvent, const FGraphEventArray & Tasks, [ENamedThreads::Type](API\Runtime\Core\Async\ENamedThreads__Type) CurrentThreadIfKnown, [ENamedThreads::Type](API\Runtime\Core\Async\ENamedThreads__Type) TriggerThread )